v3.26.1
Expense Example - BLACKROCK NATURAL RESOURCES TRUST
Apr. 30, 2026
USD ($)
Investor A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 638
Expense Example, with Redemption, 3 Years 877
Expense Example, with Redemption, 5 Years 1,135
Expense Example, with Redemption, 10 Years 1,871
Investor C  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 292
Expense Example, with Redemption, 3 Years 594
Expense Example, with Redemption, 5 Years 1,021
Expense Example, with Redemption, 10 Years 2,024
Institutional  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 93
Expense Example, with Redemption, 3 Years 292
Expense Example, with Redemption, 5 Years 508
Expense Example, with Redemption, 10 Years $ 1,130